Diffuse conditions of the large bowel which are premalignant.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003082:Colectomy; D003093:Colitis, Ulcerative / Q000150:complications*; D003110:Colonic Neoplasms / Q000209:etiology* / Q000601:surgery; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007417:Intestinal Polyps / Q000150:complications*; D008875:Middle Aged; D011230:Precancerous Conditions; D012004:Rectal Neoplasms / Q000209:etiology*